New preprint: Including minor alleles improves fluoroquinolone resistance prediction Philip Fowler, 10th November 202217th November 2022 Fluoroquinolones are used to treat both normal and drug resistant tuberculosis and therefore being able to work out if an infection is resistant or not to fluoroquinolones is very important. Sequencing the genome of an infection is increasingly used to rapidly return which antibiotics could be used to treat a patient with tuberculosis. Genetics-based approaches usually assume that any infection is homogenous which allows the variant caller to assume that any evidence of a minor alleles are due to sequencing error, allowing these to be filtered out. The WHO catalogue of mutations conferring resistance to M. tuberculosis was published in 2021 and includes several mutations in the gyrA gene that confer resistance to both moxifloxacin and levofloxacin. Despite the molecular mechanism being thought to be understood the sensitivity of genetics-based resistance prediction was lower for the fluoroquinolones than rifampicin and isoniazid. In this preprint Alice Brankin uses the large CRyPTIC dataset of M. tuberculosis to show that if two or more reads at a genome position support the existence of a known resistance-conferring mutation in gyrA, then calling that sample resistant improves the sensitivity of moxifloxacin resistance prediction from 85.4% to 94.0%, bringing it into line with rifamipcin and isoniazid. Share this: Click to share on X (Opens in new window) X Click to share on Bluesky (Opens in new window) Bluesky Click to email a link to a friend (Opens in new window) Email Click to share on LinkedIn (Opens in new window) LinkedIn Click to share on Mastodon (Opens in new window) Mastodon Related antimicrobial resistance clinical microbiology publication research tuberculosis
This blog… 31st October 2012 …is where I shall put thoughts that at least might be of interest to other… Share this: Click to share on X (Opens in new window) X Click to share on Bluesky (Opens in new window) Bluesky Click to email a link to a friend (Opens in new window) Email Click to share on LinkedIn (Opens in new window) LinkedIn Click to share on Mastodon (Opens in new window) Mastodon Read More
Updated preprint: A validated cloud-based genomic platform for co-ordinated, expedient global analysis of SARS-CoV-2 genomic epidemiology 23rd January 202528th January 2025 In August 2022 seven laboratories across the world uploaded their SARS-CoV-2 genetics files for processing… Share this: Click to share on X (Opens in new window) X Click to share on Bluesky (Opens in new window) Bluesky Click to email a link to a friend (Opens in new window) Email Click to share on LinkedIn (Opens in new window) LinkedIn Click to share on Mastodon (Opens in new window) Mastodon Read More
clinical microbiology New preprint: processing 3.9 million SARS-CoV-2 samples to make a consistent phylogenetic tree 7th May 20247th May 2024 Martin Hunt, Zam Iqbal and lots of others have written an epic preprint where they… Share this: Click to share on X (Opens in new window) X Click to share on Bluesky (Opens in new window) Bluesky Click to email a link to a friend (Opens in new window) Email Click to share on LinkedIn (Opens in new window) LinkedIn Click to share on Mastodon (Opens in new window) Mastodon Read More